It's virtually impossible for a comet to have an Earth-like gravity, as the one in this episode does. It would have to be at least a hundred times denser than iron to have such a high gravity field, and if it was so dense then it would naturally form a sphere rather than the irregular shape we see.

Great Moment :

The Vulcan snowman.

Body Count :

Zero.

Factoid :

This is the first Enterprise episode in which Berman and Braga do not recieve a writing credit.

Plotline

When Enterprise comes across the largest recorded comet, Archer decides to do a little investigating. A Vulcan ship turns up and begins 'observing' their activities, one of several Vulcan ships which have done so lately. Archer's suspicions about the ship's motives are further compounded when T'Pol recieves a secret coded transmission from outside normal channels. Is there a Vulcan conspiracy afoot?